Barring genetics

[humblehillsfarm]

I have gone down the rabbit hole of attempting to understand the barring gene. From my understanding the barring gene occurs on the male chromosome (Z). So a male can carry it on both chromosome (Zz) or carry it on one. The hitch is, there are two versions (alleles) of the barring gene (B1 and B2) which produce barring. In modern day sexed linked chickens (barred Plymouth rocks for example), B1 is the predominant allele, or version. When both genes (for male ZZ; for female ZW) are affected a defined barring will be present. If the female receives the unaffected gene (zW) she would not be a carrier of the barring gene. However if the male only has one affected gene (Zz) then his plumage will be essentially white with very little pigmentation. This is my rooster except he has a few wisps of black in his long tail feathers. This means he passed on his affected gene to the female, and in the (ZW) condition she would show a defined barring. If the male had both affected genes (ZZ) and mated with another hen with barring (ZW) 100% of his offspring would be barred. If the female was a non carrier (zW) then the males would be white with very little pigmentation (Zz) and the females would all be barred.

So not only do I think the white rooster and the buff Brahma are the parents, but I also think my chick is a girl.

I deduced my info from Wiki if anyone feels giving me a different interpretation. I know very little about genetics so I’m not sure if I’m on to something or not. https://en.m.wikipedia.org/wiki/Sex-linked_barring

 

[One Lucky Momma]

Are you a detective by profession?

 

[MysteryChicken]

I have gone down the rabbit hole of attempting to understand the barring gene. From my understanding the barring gene occurs on the male chromosome (Z). So a male can carry it on both chromosome (Zz) is carry it on one. The hitch is, there are two versions (alleles) of the barring gene (B1 and B2) which produce barring. In modern day sexed linked chickens(barred Plymouth rocks for example), B1 is the predominant allele, or version. When both genes (for male ZZ; for female ZW) are affected a defined barring will be present. If the female receives the unaffected gene (zW) she would not be a carrier of the barring gene. However if the male only has one affected gene (Zz) then his plumage will be essentially white with very little pigmentation. This is my rooster except he has a few wisps of black in his long tail feathers. This means he passed on his affected gene to the female, and in the (ZW) condition she would show a defined barring.

So not only do I think the white rooster and the buff Brahma are the parents, but I also think my chick is a girl.

I deduced my info from Wiki if anyone feels giving me a different interpretation. I know very little about genetics so I’m not sure if I’m on to something or not. https://en.m.wikipedia.org/wiki/Sex-linked_barring

The chick you posted is a cockerel.
If the Buff Brahma was 100% the mother, the color of the chick should resemble something like this.

Since the chick you have is a male, that means the Barred Rock is the mother of the chick.

This is a project Orpington of mine I'm using for example.

 

[humblehillsfarm]

The chick you posted is a cockerel.
If the Buff Brahma was 100% the mother, the color of the chick should resemble something like this.
View attachment 2353861Since the chick you have is a male, that means the Barred Rock is the mother of the chick.

This is a project Orpington of mine I'm using for example.

I feel conflicted

 

[MysteryChicken]

I feel conflicted

Sorry about that. Hope you understand what I'm saying.

If your rooster shows evidence of double barring then 100% of the offspring, males, & females will be Barred.

If the rooster shows evidence of being single Barred, then about 12% of the offspring will be Barred, & solid colored.

 

[RoostersAreAwesome]

I have gone down the rabbit hole of attempting to understand the barring gene. From my understanding the barring gene occurs on the male chromosome (Z). So a male can carry it on both chromosome (Zz) or carry it on one. The hitch is, there are two versions (alleles) of the barring gene (B1 and B2) which produce barring. In modern day sexed linked chickens (barred Plymouth rocks for example), B1 is the predominant allele, or version. When both genes (for male ZZ; for female ZW) are affected a defined barring will be present. If the female receives the unaffected gene (zW) she would not be a carrier of the barring gene. However if the male only has one affected gene (Zz) then his plumage will be essentially white with very little pigmentation. This is my rooster except he has a few wisps of black in his long tail feathers. This means he passed on his affected gene to the female, and in the (ZW) condition she would show a defined barring. If the male had both affected genes (ZZ) and mated with another hen with barring (ZW) 100% of his offspring would be barred. If the female was a non carrier (zW) then the males would be white with very little pigmentation (Zz) and the females would all be barred.

So not only do I think the white rooster and the buff Brahma are the parents, but I also think my chick is a girl.

I deduced my info from Wiki if anyone feels giving me a different interpretation. I know very little about genetics so I’m not sure if I’m on to something or not. https://en.m.wikipedia.org/wiki/Sex-linked_barring

A rooster with a single copy of sex-linked barring will be darker, not lighter. However, double barred males can be almost entirely white, but that’s only with chickens specifically bred for that coloration, and is still pretty uncommon. One example of this would be 55 flowery leghorns, but those also use mottling (white spots) to appear so light.
Your white rooster could have dominant or recessive white, both of which can cover barring.
Could you get a clear closeup picture of the chick’s comb?

 

[humblehillsfarm]

Could you get a clear closeup picture of the chick’s comb?

I can try to but it won’t be until later tomorrow at least.

 

[humblehillsfarm]

A rooster with a single copy of sex-linked barring will be darker, not lighter. However, double barred males can be almost entirely white, but that’s only with chickens specifically bred for that coloration, and is still pretty uncommon. One example of this would be 55 flowery leghorns, but those also use mottling (white spots) to appear so light.
Your white rooster could have dominant or recessive white, both of which can cover barring.
Could you get a clear closeup picture of the chick’s comb?

Here are the latest pictures of the barred chick.

 

[RoostersAreAwesome]

Here are the latest pictures of the barred chick.

That’s a pea comb, so the Brahma and the mixed breed must be the parents. I’m guessing the mixed roo is has one dominant white gene and one black/barred gene, so he was able to pass on barring to the chick.

 

[nicalandia]

I have gone down the rabbit hole of attempting to understand the barring gene. From my understanding the barring gene occurs on the male chromosome (Z). So a male can carry it on both chromosome (Zz) or carry it on one. The hitch is, there are two versions (alleles) of the barring gene (B1 and B2) which produce barring. In modern day sexed linked chickens (barred Plymouth rocks for example), B1 is the predominant allele, or version. When both genes (for male ZZ; for female ZW) are affected a defined barring will be present. If the female receives the unaffected gene (zW) she would not be a carrier of the barring gene. However if the male only has one affected gene (Zz) then his plumage will be essentially white with very little pigmentation. This is my rooster except he has a few wisps of black in his long tail feathers. This means he passed on his affected gene to the female, and in the (ZW) condition she would show a defined barring. If the male had both affected genes (ZZ) and mated with another hen with barring (ZW) 100% of his offspring would be barred. If the female was a non carrier (zW) then the males would be white with very little pigmentation (Zz) and the females would all be barred.

So not only do I think the white rooster and the buff Brahma are the parents, but I also think my chick is a girl.

I deduced my info from Wiki if anyone feels giving me a different interpretation. I know very little about genetics so I’m not sure if I’m on to something or not. https://en.m.wikipedia.org/wiki/Sex-linked_barring

Actually there are three known barring allele(but there could be more)

B0= Sex linked Extreme Dilution(B^Sed) found on production type white leghorns
B1= Sex linked Barring(B) found on barred rocks
B2 = Sex linked Dilution(B^Sd) also found on white leghorns